AMC began their big push of The Walking Dead Season 4 today, as you can tell from our earlier stories. We recently gave you a look at twenty nine images from the new season and we're back with official photos of the main cast. To be more specific, these are the main returning characters, as we can expect more than a few new characters that have a major role to play in the new season:

“In the highly anticipated new season, we find Rick Grimes (Andrew Lincoln) and the group fostering a thriving community in the safe haven of the prison. Sadly, in this brutal world, happiness is short-lived and walkers and outside threats are no match for danger brewing inside the fences. The group’s home and new way of life will be thoroughly tested, and their struggle to survive has never been so perilous. Season 4 also introduces several new characters including Bob Stookey (Lawrence Gilliard Jr., The Wire).”

Along with Lawrence Gillard Jr., Christian Serratos (Twilight) has joined the cast as Rosita Espinosa, another character from the comic book series. It was also just reported today (via Deadline) Alanna Masterson has joined the cast in an unspecified role. It has been said that both actresses have the possibility of becoming a regular in Season 5, provided their characters survive the fourth season.

The 16-episode fourth season starts on October 13th in the US. Internationally, the series is expected to return on the same week in most countries, so check your local listings for a specific date and time. Like last season, there will be a break after the first eight episodes, with The Walking Dead Season 4 returning in February 2014 with the final eight episodes.

The first new episode is titled “30 Days Without an Accident” and here is the official synopsis:

“Rick and the group are as close to an ideal life as possible at the prison. Will they be able to hold on to humanity in the face of a new evil?”

“30 Days Without an Accident” was directed by Greg Nicotero and written by the series’ new showrunner, Scott M. Gimple. Look for more content from The Walking Dead Season 4 leading up to the premiere on October 13th. You can catch up on our recent coverage by visiting the following links: